Ignition apparatus



p 1937- a H. A. WALLENTA 2,093,700

IGNI T ION APPARATUS Filed Dec. 29, 1934 Patented Sept. 21, 1937 UNITEDSTATES PATENT omoo IGNITION APPARATUS Bernard H. A. Wallenta, WesternSprings, 111., assignor to Kellogg Switchboard and Supply Company,Chicago, 111., a. corporation of Illinois Application December 29,1934,S nsea-15o 13 Claims.

.of an ignition coil and appurtenant apparatus which will be compact andcheap to manufacture and yet will give satisfactory ignition for motorsemploying several cylinders, such as eight or twelve. V it One of thefeatures of the invention is a unitary .coil structure comprising agenerally H-shaped core on the legs of which are two independent primarycoils and a compound secondary coil, the parts of which are associatedwith the primary 5 coils, respectively.

Another feature of the invention closely related to the coil structureis the provision of an interrupter having two pairs of contacts, onepair being associated with each of the primary coils. The common cam isarranged to open the interrupter contact pairs alternately, a sparkingimplusebeing created in the secondary coil each time one or the other ofthe interrupter contact pairs is opened. I

The present structure provides a very compact and cheap core and coilarrangement which I necessitates but a single interrupter cam having'twobreaker arms associated therewith and -a single distributor which isassociated with the compound secondary coil.

It is believed the further disclosure of the invention will be bestunderstood from a detailed description thereof taken in connection withthe accompanying drawing in which, i I i Fig. 1 is a diagrammatic layoutshowing the core structure with the coils thereon and the v lgvreakercontacts and distributor arm associated therewith; and

Fig. 2 is an enlarged view of the coil structure w e it more ly in itsactual proportions.

7 Referring now to the drawing, in which like .reference charactersindicatethe same parts in the several views, I indicates the storagebattery which is adapted to be connected to the primary coils II and I2by means of the ordinary switch l3. It will be noted that the coils I Iand I2 are connected at their right ends in parallel tothe same batterylead l4 and the left ends of f the coils II and I2 are connected to thebreaker o arms- I5 and I6, respectively. Intermediate the --arms I5 andI6 is an operating cam ll of any preferred construction which is adaptedto alterl nately operate the arms l5 and I6. Cooperating with thecontact arms |5 and I6 are the stau-tionary contacts l8 and I9,respectively, which are connected to ground or the frame of the machine.Each of the pairs of contacts |5|8 and -|6|9 is bridged by a condenser20. The secondary comprises the coils 2| and 22 which are in series, thecoil 2| being associated with the primary coil I while the coil 22 isassociated with the primary coil |2. It' will be noted that one end ofthe secondary coil H is joined to the battery lead 14 by the conductor23 while the remote end of the coil 22 is joined to the distributor arm24 by means of the lead 25. The a distributor ,arm 24 is adapted tocontact or pass immediately adjacent to the several contacts 26 whichare connected respectively to the spark plugs 21 of the motor.

Reference to the drawing will show that the 1 primary coil II andassociated secondary coil 2| are mounted on one leg 28 of thesubstantially H-shaped core element 29 while the primary coil l2 andsecondary coil section 22 are mounted on the core leg 30. l

The core 29 will preferably be formed of laminated sheets in accordancewith the usual practice.

As above stated, the breaker arms l5 and It will be operated alternatelyto interrupt the circuits of the primary coils H and I2, respectively..Justprior to the opening operation of one or the other of the breakerarms, both the pairs of breaker contacts will be closed and battery willthen be flowing through both primary coils. During this period the coilsII and I2 will 00- operate to cause the right end of the core section 28to become positive and the left end of the core section 30 to becomenegative. obviously the lines of magnetic force will travel in acomplete or continuous loop through the core legs 28 and 30 on one sideand the opposite correspending legs of the H-shaped core piece on theother- Practically no magnetic lines will flow through the cross member3| of the core structure ,while both pairs of breaker contacts areclosed. The general path of the magnetic lines during this period isindicated in Fig. 1 of the drawing by the outer dotted rectangle.

If, now, the contacts l5 and I8 are separated At this time 7 -legs ofsaid core, circuits for said primary coils respectively, each of saidcircuits including a turns and the circuit of the coil I2 is closed atthis time practically no impedance will be produced in the secondary orhigh tension circuit due to the secondary coil section 22. The contactsl5-|8 are immediately closed and there is a period during which bothsets of contacts are closed before the contacts l6l9 are separated atwhich time the magnetic field structure is such as indicated by thesmall dotted rectangle at the right in Fig. 1. The magnetic linesproduced by the active coil l I will now pass through the cross member3| of the core and the left end of the magnetic structure will beshunted out to produce a spark as above described.

It will thus be seen that applicant has produced an ignition structurewhich is Very compact and relatively cheap to,.manufacture, yet willprovide as satisfactory ignition asan" ignition device comprising twoseparate 0011s,, and two separate distributors.

" While in the drawing and in the above description but one form orembodiment of the invention has been disclosed, itis appreciated thatvariousmodifications"may be made in the arrangement without departingfrom the spirit offthle invention. The invention, therefore, should" belimited only'by the scope of the appended claims.

Having thus described my invention, what I claim as newand desiretosecure by United States Letters Patent is:

'1 In a distributing apparatus, an H-shaped core, a 'pair of primarycoils on'said core, circuits for saidprimary coils respectively, each ofsaid circuits including a source of current and a pair of interruptercontacts, said current fiowing in the same direction in both of saidprimary coils, a'cam for actuating said interrupter contacts, asecondary coil located on one side of said core associated'with the saidprimary coils, and a distributor arm electrically connected to the saidsecondary coil.

*-2.-In"a"distributing apparatus, an H-shaped core, a pair of primarycoils on said core, circuits for'said primary coils respectively; eachof saidycircuits'including a source of current and a pair ofinterruptercontacts, said current flowing in the same direction in both of saidprimary coils, a cam .for' alternately actuating saidinterrupter'conta'cts, .a secondary coil wound on oppositelegs of saidcore and associated with the said primary coils and a distributor armelectrically connected to the said secondary'coil.

3. Inga; distributing apparatus, an H-shaped core; a-pair of primarycoils located on opposite source'of current and a pair of interruptercontacts, a cam for alternately actuating said interrupter contacts, asecondary coil having portions inductively associated with the saidprimary coils,

[the current flow in said portions of said secondary coil beinginopposite directions, and a distributor arm electrically connected to thesaid secondary coil. 4. In a distributing apparatus, an H-shaped core, apair of primary coils on opposite legs of said core, circuits for saidprimary coils, respectively,

each of said-circuits including a source of current and a pair ofinterrupter contacts, said current flowing in the same direction in bothof said primarycoils, a cam for alternately actuati-ngsaid interruptercontacts, a compound sec- -ondary coil the partsof which are inductivelyassociated with the said primary coils respectively,

and a distributor arm electrically connected to the said secondary coil.

5. In a distributing apparatus, a generally H- shaped core, a pair ofprimary coils on opposite legs of said core, circuits for said primarycoils respectively, each of said circuits including a source of currentand a pair of interrupter contacts, a cam for alternately actuating saidinterrupter contacts, a compound secondary coil the parts of which areWound upon opposite legs of said core and associated with the saidprimary coils respectively, the current in the respective parts of saidsecondary flowing in opposite directions, anda distributor armelectrically connected to' the said secondary coil.

6. In a distributing apparatus, a generally H- shaped core, a pair ofprimary coils mounted in substantial alignment on opposite legs of saidcore, circuits for said primary coils respectively, each of saidcircuits including a source of energy and a pair of interruptercontacts,a cam for actuating said interrupter contacts, a compound secondary coilthe parts of which are inductively associated with the said primarycoils respectively, and a distributor arm electrically connected to thesaid secondary coil.

7. An ignition apparatus comprising a core, a pair of primary coilswound on said core so as to cause similar magnetic efiects on said corewhen said coils are traversed by electrical current, electrical circuitsfor said primary coils respectively, interrupter means for alternatelyopening and closing said primary coil circuits, a secondary coil of twoparts wound in series on said core, said parts being in inductiverelation to said primary coils respectively, one of said secondary coilsbeing wound about said core in the same direction as its associatedprimary coil and the other secondary coil being wound about said core ina direction opposite to that of its associated;

primary coil circuits, a secondary coil having portions wound inseries,- said portions being posi tioned on said core in inductiverelation to the 'said primary coils respectively, one of said secondarycoils being wound about said core in the same direction as itsassociated primary coil and the other secondary coil being wound aboutsaid;

core in a direction opposite to its associated primary coil, and anelectrical circuit for said secondary coil.

- 9. An ignition apparatus comprising a core, a

pair ofprimary coils located on said core and:

wound so as to cause similar magnetic effects on said core when saidcoils are traversed by electrical current,'the inner ends of said coilsbeing separated a substantial distance, electrical circuits for saidprimary coils respectively, a sec-,4

ondary coil comprising two portions wound in series on said core ininductive relation to said primary coils respectively, one of saidsecondary coils being wound about said core in the same direction as itsassociated primary coil and the other secondary coil being wound aboutsaid core in a direction opposite to its associated primary coil, and anelectrical circuit for said secondary coil.

10. Anignition device comprising an H--shaped core, a pair of primarycoils wound in the same direction and located on one leg of said core,electrical circuits for said primary coils respectively. a secondarycoil of two parts wound in series in opposite directions and located onone leg of said core, and an electrical circuit for said secondary coil.

11. An ignition apparatus comprising an H- shaped core, a pair ofprimary coils wound in the same direction and located at opposite endsof one leg 0! said core, a secondary coil having portions wound inseries in opposite directions, said portions each being positioned onsaid core in inductive relation to the respective primary coils, andelectrical circuits for said coils.

12. An ignition apparatus comprising an H- shaped core, a pair ofprimary coils wound in the same direction and located on one leg of saidcore, the inner ends of said coils being separated by the crossbar ofsaid core, a secondary coil having two portions wound in series inopposite directions and positioned on said core in inductive relation tosaid respective primary coils, and electrical circuits 102 said coils.

13. An ignition apparatus comprising an H- shaped core, a pair ofprimary coils located on one leg 0! said core, the inner ends beingseparated by the crossbar of said core. and a secondary windingpositioned on said core in inductive relation to said primary coils.

BERNARD H. A. WALLENTA.

